content: /*
   * Copyright (C) 2016 Jake Wharton
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package hu.akarnokd.rxjava3.retrofit;
  
  import io.reactivex.rxjava3.core.*;
  import io.reactivex.rxjava3.disposables.Disposable;
  import io.reactivex.rxjava3.exceptions.*;
  import io.reactivex.rxjava3.plugins.RxJavaPlugins;
  import retrofit2.*;
  
  final class BodyObservable<T> extends Observable<T> {
    private final Observable<Response<T>> upstream;
  
    BodyObservable(Observable<Response<T>> upstream) {
      this.upstream = upstream;
    }
  
    @Override protected void subscribeActual(Observer<? super T> observer) {
      upstream.subscribe(new BodyObserver<T>(observer));
    }
  
    private static class BodyObserver<R> implements Observer<Response<R>> {
      private final Observer<? super R> observer;
      private boolean terminated;
  
      BodyObserver(Observer<? super R> observer) {
        this.observer = observer;
      }
  
      @Override public void onSubscribe(Disposable disposable) {
        observer.onSubscribe(disposable);
      }
  
      @Override public void onNext(Response<R> response) {
        if (response.isSuccessful()) {
          observer.onNext(response.body());
        } else {
          terminated = true;
          Throwable t = new HttpException(response);
          try {
            observer.onError(t);
          } catch (Throwable inner) {
            Exceptions.throwIfFatal(inner);
            RxJavaPlugins.onError(new CompositeException(t, inner));
          }
        }
      }
  
      @Override public void onComplete() {
        if (!terminated) {
          observer.onComplete();
        }
      }
  
      @Override public void onError(Throwable throwable) {
        if (!terminated) {
          observer.onError(throwable);
        } else {
          // This should never happen! onNext handles and forwards errors automatically.
          Throwable broken = new AssertionError(
              "This should never happen! Report as a bug with the full stacktrace.");
          //noinspection UnnecessaryInitCause Two-arg AssertionError constructor is 1.7+ only.
          broken.initCause(throwable);
          RxJavaPlugins.onError(broken);
        }
      }
    }
  }
  